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J Arthroplasty 2019 Mar 30. Epub 2019 Mar 30.

Hospital for Special Surgery, Adult Reconstruction and Joint Replacement, New York, NY.

Introduction: Modular Dual Mobility (MDM) constructs in total hip arthroplasty (THA) offer increased hip stability compared with constrained liners, without compromising hip range of motion. The purpose of this study was to evaluate outcomes of revision THA using MDM.

Methods: The study was a multiinstitutional retrospective cohort study of 315 hips that underwent revision THA using MDM between 2011 and 2017. Read More

Paediatr Child Health 2019 May 27;24(2):e88-e93. Epub 2018 Jun 27.

Department of Pediatrics, Queen's University, Kingston, Ontario.

Objectives: Breech presentation is a recognized risk factor for developmental dysplasia of the hip (DDH). Within North America, there is a lack of consensus on screening guidelines for DDH in infants with a negative physical examination of the hips. This study evaluates the need for ultrasound screening in all breech born infants to detect DDH and whether this is influenced by gender, gestational age and mode of delivery. Read More

J Orthop 2019 Jul-Aug;16(4):334-336. Epub 2019 Mar 26.

Department of Orthopaedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.

Purpose: We compared the outcome of total hip arthroplasty (THA) in this age group using direct anterior or posterior approach.

Methods: We performed a retrospective analysis following consecutive primary THA in patients over 80 years.

Results: The DAA group demonstrated significantly shorter length of stay, better functional improvement, no dislocation or revision while PA group required two revisions due to dislocation. Read More

Acta Orthop 2019 Apr 17:1-10. Epub 2019 Apr 17.

a Department of Orthopaedic Surgery , University of Turku and Turku University Hospital , Turku.

Background and purpose - The use of trabecular metal (TM) cups for primary total hip arthroplasty (THA) is increasing. Some recent data suggest that the use of TM in primary THA might be associated with an increased risk of revision. We compared implant survival of Continuum acetabular cups with other commonly used uncemented cups. Read More

J Arthroplasty 2019 Mar 28. Epub 2019 Mar 28.

Healthcare Research Institute, Hospital for Special Surgery, New York, NY.

Background: Peripheral nerve injury (PNI) is a devastating complication following total hip arthroplasty (THA). The purpose of this study was to identify risk factors for PNI after THA using a New York Statewide Planning and Research Cooperative System (SPARCS).

Methods: The SPARCS database was queried to identify patients who had undergone THA from 1996 to 2011. Read More

Oper Orthop Traumatol 2019 Apr 12. Epub 2019 Apr 12.

Fabricius Klinik, Gelenkzentrum Bergisch Land, Freiheitstsr. 203, 42853, Remscheid, Germany.

Objective: Portal assisted minimally invasive total hip arthroplasty without dislocation of the femoral head with preservation of the hip capsule and the external rotators in the lateral decubitus position for rapid recovery with the option of expandability to a mini posterior or classic posterolateral approach at any time.

Indications: Primary and secondary arthritis of the hip, femoral head necrosis, femoral neck fracture.

Contraindications: Severe anatomical disorders of the proximal femur, congenital high hip dysplasia, implanted hardware in the trochanteric region, local and systemic infections. Read More

Orthop Res Rev 2019 4;11:41-46. Epub 2019 Feb 4.

Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran,

Background: Fractures of the acetabulum are challenging and very difficult to treat, and even after fixation, they can lead to posttraumatic arthritis. Total hip arthroplasty (THA) has been the most common surgery performed for the complications of posttraumatic arthritis in this group of patients.

Aim: In this article, it is aimed to assess the functional results and complications of the conversion to THA for posttraumatic arthritis after acetabular fracture. Read More

Arthroscopy 2019 Apr 12. Epub 2019 Apr 12.

Department of Orthopaedic Surgery, Washington University in St Louis, St Louis, Missouri, U.S.A.. Electronic address:

Purpose: To compare the delivered radiation dose between a low-dose hip computed tomography (CT) scan protocol and traditional hip CT scan protocols (i.e., "traditional CT"). Read More

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2019 Apr;33(4):451-454

Department of Orthopedics, Shanghai Sixth People's Hospital, Affiliated to Shanghai Jiaotong University, Shanghai, 200233, P.R.China.

Objective: To assess the mid-term effecitveness of femoroacetabular impingement (FAI) treated by surgical hip dislocation.

Methods: Between April 2014 and August 2015, 15 patients (16 hips) with FAI were enrolled in the study and treated with surgical hip dislocation. There were 12 males and 3 females with an average age of 36. Read More

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2019 Apr;33(4):445-450

Department of Traumatology & Orthopedics, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing Jiangsu, 210029,

Objective: To compare effectiveness between sequestrum clearance and impacting bone graft and rotational osteotomy on the base of femoral neck via surgical hip dislocation approach for avascular necrosis of femoral head (ANFH) at Association Research Circulation Osseous (ARCO ) stage Ⅲ.

Methods: A clinical data of 24 patients (27 hips) with ANFH at ARCO stage Ⅲ, who met the inclusion criteria between June 2012 and November 2017, was retrospectively analysed. Of all patients, 12 patients (14 hips) were treated with sequestrum clearance and impacting bone graft via surgical hip dislocation approach (group A); and 12 patients (13 hips) were treated with rotational osteotomy on the base of femoral neck via surgical hip dislocation approach (group B). Read More

Med Sci (Basel) 2019 Apr 11;7(4). Epub 2019 Apr 11.

Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia.

Development dysplasia of the hip (DDH) is a complex developmental disorder despite being a relatively common condition mainly caused by incompatibility of the femoral head and the abnormal joint socket. Development dysplasia of the hip describes a wide spectrum of disorders ranging from minor acetabular dysplasia to irreducible dislocation of the hip. Modern medicine still suffers from lack of information about screening and precise genetic examination. Read More

Eur Rev Med Pharmacol Sci 2019 Apr;23(2 Suppl):6-11

Department of Orthopaedics and Paediatric Orthopaedics, and Department of Medical Informatics and Biostatistics; University of Medicine and Pharmacy, Cluj-Napoca, Romania.

Total necrosis of the femoral head is a common sequelae after septic hip arthritis in infancy. Septic hip dislocation may develop, with severe functional consequences on the growing child: limping and limb length discrepancy. We present our staged surgical treatment of Choi's type IV A sequelae of septic hip arthritis in a 2-year old boy. Read More

J Orthop Res 2019 Apr 12. Epub 2019 Apr 12.

Technology Implementation Research Center, Massachusetts General Hospital, Boston, Massachusetts.

The constrained liner is an important tool for the treatment of recurrent dislocation, which continues to represent an important challenge in total hip arthroplasty. In constrained liner design, there is a tradeoff between dislocation resistance and range of motion. However, studies investigating their sensitivity to design parameters are scant. Read More

J Arthroplasty 2019 Mar 13. Epub 2019 Mar 13.

Andrews Institute for Orthopaedics and Sports Medicine, Gulf Breeze, FL.

Background: Posterior hip precautions have been routinely prescribed to decrease dislocation rates. The purpose of this study was to determine whether the absence of hip precautions improved early recovery after total hip arthroplasty via the posterolateral approach.

Methods: Patients undergoing total hip arthroplasty via the posterolateral approach at 3 centers were enrolled. Read More

Hip Int 2019 Apr 9:1120700019841579. Epub 2019 Apr 9.

Department of Orthopaedic Surgery, Reinier de Graaf Hospital, Delft, The Netherlands.

Objectives: Traction force widens the joint space during hip arthroscopy. It is unclear how much the traction force varies and if it is related to the joint space widening. Main goal of our study was to measure the amount of force needed to widen the hip joint. Read More

J Arthroplasty 2019 Mar 8. Epub 2019 Mar 8.

Department of Orthopaedics and Trauma, Royal Adelaide Hospital, Adelaide, South Australia, Australia; Centre for Orthopaedic and Trauma Research, The University of Adelaide, Adelaide, South Australia, Australia.

Background: The aim of this study is to assess the outcomes of 52 consecutive Vancouver B2 peri-prosthetic fractures around cemented polished double-tapered stems treated by open reduction and internal fixation in 2 trauma centers in 2 countries.

Methods: Outcomes included modified Harris Hip Score (mHHS), Harris Pain Score, and return to pre-injury mobility. Fracture healing was assessed; implant subsidence measured and complications including re-operations reported. Read More

Acta Orthop Traumatol Turc 2019 Apr 4. Epub 2019 Apr 4.

IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy. Electronic address:

Objectives: The aim of this study was to evaluate the middle term cup survival, assess the functional implementation and the radiographic evolution of tantalum acetabular cups implanted on patients with a history of pelvic radiotherapy.

Methods: From 2005 to 2013, we performed 12 THA replacements (4 males 8 females; mean age: 46.6 years (range 25-75)) on irradiated bone with Trabecular metal acetabular cups, 8 primary implants and 4 revision implants. Read More

Acta Orthop 2019 Apr 8:1-12. Epub 2019 Apr 8.

b Department of Orthopaedics , Institute of Surgical Science, Sahlgrenska University Hospital, Gothenburg University , Mölndal , Sweden.

Background and purpose - Uncemented cups in total hip arthroplasty (THA) are often augmented with additional screws to enhance their primary stability. We investigated whether there is a difference in the risk for revision between cups with screw holes and cups without screw holes. Patients and methods - We analyzed the risk for cup revision of uncemented cups registered in the Swedish Hip Arthroplasty Register (SHAR) between 2000 and 2017 with respe ct to the presence of screw holes. Read More

Acta Orthop Traumatol Turc 2019 Apr 3. Epub 2019 Apr 3.

Saglik Bilimleri University, Umraniy Training and Research Hospital, Istanbul, Turkey. Electronic address:

Obective: The aim of this study was to evaluate the effect of combined intravenous and topical use of tranexamic acid (TXA) on total blood loss and transfusion rate in total hip arthroplasty.

Methods: This prospective randomized study included 57 patients who had undergone total hip arthroplasty between September 2016 and September 2017. The IV administration group (Group 1) consisted of 26 patients (mean age: 63. Read More

Arthroscopy 2019 Apr;35(4):1128-1129

University of Utah.

When treating femoroacetabular impingement, appropriate visualization is needed to technically perform a complete osteoplasty. Adequate visualization typically requires some level of disruption of the hip capsule during the surgical approach. As a result, complications including microinstability or frank dislocation may result from any violation of the hip capsule. Read More

J Bone Joint Surg Am 2019 Apr;101(7):620-627

Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota.

Background: Cementation of a constrained liner is a viable option for treating instability after total hip arthroplasty (THA) when the acetabular component is well fixed and well aligned. However, concerns regarding long-term mechanical failure and recurrent instability remain. The aim of this study was to evaluate the long-term survivorship, complications, and clinical and radiographic outcomes of constrained polyethylene liners cemented into well-fixed acetabular components at the time of revision THA. Read More

J Bone Joint Surg Am 2019 Apr;101(7):572-579

Division of Orthopaedic Surgery, Department of Surgery (B.R., D.P., H.K., D.W., R.J., and H.J.K.), and Institute of Health Policy, Management and Evaluation (D.P. and H.J.K.), University of Toronto, Toronto, Ontario, Canada.

Background: Although the prevalence of displaced femoral neck fractures in the elderly population is increasing worldwide, there remains controversy as to whether these injuries should be managed with hemiarthroplasty or total hip arthroplasty. Although total hip arthroplasties result in better function, they are more expensive and may have higher complication rates. Our objective was to compare the complication rates and health-care costs between hemiarthroplasty and total hip arthroplasty for displaced femoral neck fractures in the elderly population. Read More

Arch Orthop Trauma Surg 2019 May 2;139(5):723-728. Epub 2019 Apr 2.

Department of Orthopaedic Surgery, Division of Adult Reconstruction and Joint Replacement, Hospital for Special Surgery, 535 East 70th Street, New York, NY, 10021, USA.

Background: Patients with developmental dysplasia of the hip (DDH) require special surgical considerations for total hip arthroplasty (THA). Despite the difficulties posed by the population's anatomical abnormalities, few large evaluations of postoperative outcomes exist. This study seeks to characterize outcomes following primary THA among patients diagnosed with DDH. Read More

Biomed Res Int 2019 28;2019:3971571. Epub 2019 Feb 28.

Department of Orthopaedic Surgery, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan.

Background And Purpose: Hip dislocation combined with acetabular fracture remains a challenging condition for orthopedic surgeons. In this study, we utilized a computer-assisted simulation and three-dimensional (3D) printing technology to treat patients with hip dislocation combined with acetabular fracture. We hypothesized that the 3D printing-assisted method would shorten the internal fixation time and surgical time. Read More

Adv Orthop 2019 3;2019:5193945. Epub 2019 Mar 3.

Melbourne Orthopaedic Group, Windsor, VIC, Australia.

Despite strongly positive results of total hip arthroplasty (THA), patients remain at risk for complications including dislocation. Spinopelvic motion and the hip-spine relationship have been recognized as important factors in surgical planning and implant positioning in THA. Periarticular osteophytes are one of the hallmark pathoanatomic features of osteoarthritis and may influence implant positioning and joint stability; residual osteophytes at the anterior femoral neck may cause anterior impingement and posterior instability. Read More

J Orthop Surg (Hong Kong) 2019 May-Aug;27(2):2309499019838668

1 Department of Orthopaedics, University of Szeged, Szeged, Hungary.

Purpose:: Metaphyseal, proximally anchored uncemented stems for total hip arthroplasty provide bone preservation and decrease the incidence of proximal stress shielding and thigh pain. Our study investigated the clinical and radiological outcome of the DePuy Proxima™ short stem at a minimum of 7 years.

Methods:: Eighty-one consecutive patients (86 procedures) under the age of 70 undergoing primary total hip replacement at two arthroplasty centres were enrolled. Read More

Acta Orthop 2019 Apr 2:1-7. Epub 2019 Apr 2.

d Baltalimani Bone and Joint Diseases Education and Research Hospital , Department of Pediatric Orthopaedics , Istanbul.

Background and purpose - The value of arthroscopic surgical reduction in developmental hip dysplasia is poorly known. We compared the clinical and radiographic efficacy of arthroscopic and medial open surgical reduction in patients less than 18 months of age with developmental hip dysplasia. Patients and methods - 54 patients with a mean age of 11 months who were treated by Ludloff's medial open reduction technique (28 hips, Group L) or arthroscopic surgical reduction technique (26 hips, Group A) were evaluated in this case series. Read More

Arch Orthop Trauma Surg 2019 Apr 1. Epub 2019 Apr 1.

Hospital for Special Surgery, 535 East 70th Street, New York, NY, 10021, USA.

Introduction: Malpositioning of the cup in total hip arthroplasty (THA) is associated with dislocation, early polyethylene wear, and impingement. The direct anterior approach (DAA) THA allows for intraoperative fluoroscopy imaging (IF). The current study investigates the following research hypotheses: (1) intraoperative measurements of radiographic cup inclination (RI) are reliable and reproducible. Read More

Technol Health Care 2019 Mar 22. Epub 2019 Mar 22.

Julius Centre for Health Sciences and Primary Care, University Medical Centre, Utrecht, The Netherlands.

Background: Blood transfusion is a common practice, but it is not without cost and risk. A model that predicts the risk of blood transfusion could guide informed preoperative blood ordering and use of blood loss preventive measures.

Objective: This study aimed to develop a prediction model of blood transfusion in children with developmental dysplasia of the hip (DDH) undergoing surgery. Read More

Acta Orthop 2019 Apr 1:1-8. Epub 2019 Apr 1.

a Swedish Hip Arthroplasty Register , Gothenburg , Sweden.

Background and purpose - The association between long-term patient survival and elective primary total hip replacement (THR) has been described extensively. The long-term survival following reoperation of THR is less well understood. We investigated the relative survival of patients undergoing reoperation following elective THR and explored an association between the indication for the reoperation and relative survival. Read More

EFORT Open Rev 2019 Feb 13;4(2):44-55. Epub 2019 Feb 13.

London North West University Healthcare NHS Trust, UK.

Total hip arthroplasty (THA) is one of the most commonly performed orthopaedic procedures. Some concern exists that trainee-performed THA may adversely affect patient outcomes. The aim of this meta-analysis was to compare outcomes following THA performed by surgical trainees and consultant surgeons. Read More

Bone Joint J 2019 Apr;101-B(4):365-371

Washington University Orthopedics, Barnes Jewish Hospital, St. Louis, Missouri, USA.

Aims: Modular dual mobility (DM) prostheses in which a cobalt-chromium liner is inserted into a titanium acetabular shell ( vs a monoblock acetabular component) have the advantage of allowing supplementary screw fixation, but the potential for corrosion between the liner and acetabulum has raised concerns. While DM prostheses have shown improved stability in patients deemed 'high-risk' for dislocation undergoing total hip arthroplasty (THA), their performance in young, active patients has not been reported. This study's purpose was to assess clinical outcomes, metal ion levels, and periprosthetic femoral bone mineral density (BMD) in young, active patients receiving a modular DM acetabulum and recently introduced titanium, proximally coated, tapered femoral stem design. Read More

Bone Joint J 2019 04;101-B(4):390-395

Hiroshima University, Higashi-Hiroshima, Japan.

Aims: The aim of this study was to report the long-term results of rotational acetabular osteotomy (RAO) for symptomatic hip dysplasia in patients aged younger than 21 years at the time of surgery.

Patients And Methods: We evaluated 31 patients (37 hips) aged younger than 21 years at the time of surgery retrospectively. There were 29 female and two male patients. Read More

Bone Joint J 2019 04;101-B(4):378-385

Orthopaedics Department, Hospital Universitario La Paz-Idi Paz, Madrid, Spain.

Aims: We previously reported the long-term results of the cementless Duraloc-Profile total hip arthroplasty (THA) system in a 12- to 15-year follow-up study. In this paper, we provide an update on the clinical and radiological results of a previously reported cohort of patients at 23 to 26 years´ follow-up.

Patients And Methods: Of the 99 original patients (111 hips), 73 patients (82 hips) with a mean age of 56. Read More

Semin Musculoskelet Radiol 2019 Apr 29;23(2):162-176. Epub 2019 Mar 29.

Department of Radiology, Northwestern University/Northwestern Memorial Hospital, Chicago, Illinois.

Hip arthroplasty is a common and largely successful surgical procedure, often used for the treatment of advanced osteoarthritis. Imaging plays a key role in routine postoperative imaging surveillance as well as the evaluation of post-arthroplasty pain. Radiographs are the first-line imaging modality and may be followed by computed tomography (CT), ultrasound, and/or magnetic resonance imaging (MRI). Read More

Hip Int 2019 Mar 29:1120700019836383. Epub 2019 Mar 29.

Department of Orthopaedic Surgery, Concord Repatriation General Hospital, Concord, Australia.

Background:: Offset and leg length (LL) restoration are critical for the achievement of a stable, well-functioning hip following total hip arthroplasty (THA). Several techniques are described in the literature, including a hip calibration gauge. We question whether meticulous preoperative planning of a specific surgical technique in combination with the utilisation of a calibration gauge can provide an accurate offset and LL restoration. Read More

J Orthop 2019 May-Jun;16(3):249-253. Epub 2019 Feb 28.

Department of Orthopaedic and Trauma Surgery, St. Antonius Ziekenhuis, Soestwetering 1, 3543 AZ, Utrecht, the Netherlands.

A case of giant synovial chondromatosis of the hip with extra-articular localisation in the ileopectineal bursa is presented and the literature concerning this condition is reviewed. Synovial chondromatosis is a rare condition of unknown aetiology. A literature search was performed to identify studies describing outcome after surgical treatment of synovial chondromatosis of the hip. Read More

Orthop Traumatol Surg Res 2019 May 25;105(3):491-495. Epub 2019 Mar 25.

Department of Orthopaedic Surgery, University hospital of Saint-Etienne, avenue Albert-Raimond, 42270 Saint-Priest-en-Jarez, France; EA 7424, Inter-university Laboratory of Human Movement Science, University Lyon, University Jean-Monnet, 42000 Saint-Etienne, France.

Introduction: Performing total hip arthroplasty (THA) following failed internal fixation of proximal femur fractures is associated with an elevated risk of implant dislocation. We hypothesized that using a dual mobility (DM) cup will help to reduce the risk of postoperative instability in this specific context.

Material And Methods: This was a retrospective study of 33 consecutive patients who underwent DM THA following failed internal fixation of a proximal femur fracture. Read More

J Orthop Case Rep 2018 Nov-Dec;8(6):54-57

Department of Orthopaedics, School of Health Sciences, University of Thessaly, Greece.

Introduction: Common causes of revision total hip arthroplasty (THA) are component wear, implant loosening, dislocation, and infection.

Case Report: An 84-year-old female patient is presented with an unusual pattern of hip dislocation due to structural failure of the cup construct and excessive component wear.

Conclusion: Component wear of THA can drive to catastrophic failure of the implants and significant soft tissue metallosis. Read More

J Orthop Case Rep 2018 Nov-Dec;8(6):46-49

Department of Orthopaedics, Sant Parmanand Hospital, Civil Lines, New Delhi, India.

Introduction: Acute complete dissociation of a cemented socket from the acetabular cavity is very rare and has been described only in relation to closed reduction maneuver of a dislocated hip arthroplasty.

Case Report: We present a case of recurrent hip dislocation in a 70-year-old female post total hip arthroplasty for which a cemented dual mobility (DM) component was used. The cemented socket dissociated from the acetabular cavity with the polyethylene liner insitul-year post- surgery. Read More

Evid Based Complement Alternat Med 2019 24;2019:5870179. Epub 2019 Feb 24.

Department of Orthopedics, China Medical University Hospital, Taichung, Taiwan.

Background: Osteonecrosis of the femoral head (ONFH) contributes to 45% of total hip replacements (THRs) annually in Taiwan. Nontraumatic ONFH (NONFH) is multifactorial; no effective Western medicine is available to delay the disease process. This population-based cohort study investigated the association of traditional Chinese medicine (TCM) therapy with risk of THR in patients with NONFH. Read More

J Orthop Surg (Hong Kong) 2019 May-Aug;27(2):2309499019836378

1 Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.

Purpose:: We aimed to evaluate (1) the intraoperative parameters, (2) cup position, (3) complications, (4) long-term results, and (5) the survivorship of cementless total hip arthroplastys (THAs) with use of ceramic bearings in patients with a history of acetabular fracture.

Methods:: We compared 57 THAs in patients, who were treated due to previous acetabular fracture (posttraumatic group), with 57 propensity score-matched THAs in patients, who were operated due to femoral head osteonecrosis (osteonecrotic group), at a minimum of 5-year follow-up.

Results:: The operation time was longer ( p = 0. Read More

J Orthop Surg (Hong Kong) 2019 May-Aug;27(2):2309499019836816

Department of Orthopedic Surgery, Nagano Prefectural Shinshu Medical Center, Nagano, Japan.

Background:: Direct anterior approach (DAA) is known to diminish a dislocation risk and widely used for total hip arthroplasty (THA). On the other hand, anterior dislocation due to increasing stem anteversion and cup anteversion is an important complication.

Methods:: A retrospective analysis of 140 (male/female: 10/130) consecutive patients with 149 hips who had undergone primary THA in the period between 2011 and 2015 was conducted. Read More

Rev Esp Cir Ortop Traumatol 2019 May - Jun;63(3):187-191. Epub 2019 Mar 23.

Fondo Nacional de Recursos, Montevideo, Uruguay.

Objective: To evaluate the incidence of mortality, revision and functional assessment after hip arthroplasty in dialysis patients in Uruguay.

Methods: An observational analytical study of a historical cohort of hip arthroplasties was performed on patients with chronic kidney disease treated with haemodialysis or peritoneal dialysis between 1/1/2000-31/12/2013; survival analysis using the Kaplan-Meier method. Functional and radiological evaluation of the live patients was also carried out. Read More

J Arthroplasty 2019 Feb 21. Epub 2019 Feb 21.

Department of Orthopaedic Surgery, Rothman Institute at Thomas Jefferson University, Philadelphia, PA.

Background: The influence of surgical approach on risk of early postoperative mechanical complications after total hip arthroplasty (THA) continues to be a focus of debate. We performed the first single-institution study on risk of early operative and nonoperative mechanical complications after THA based on approach, with the hypothesis that there would be no clinically significant difference with modern surgical methods.

Methods: A retrospective study was conducted on 16,186 consecutive THA performed from 2010 to 2016. Read More

J Orthop 2019 May-Jun;16(3):220-223. Epub 2019 Feb 28.

Lancashire Teaching Hospitals NHS Foundation Trust, PR2 9HT, United Kingdom.

Objectives: Recurrent dislocation of Total Hip Replacement (THR) is often multifactorial and remains a significant surgical challenge with a significant risk of further instability. Dual Mobility Cups (DMC) have been used widely with good long term results in France with few studies in the British literature, especially assessing their use for recurrent instability. We set out to assess whether recurrent instability can be successfully treated solely with revision of acetabular component to a dual mobility cup. Read More

J Orthop 2019 Mar-Apr;16(2):179-181. Epub 2019 Feb 28.

Consultant Trauma & Orthopaedic Surgeon, Department of Trauma & Orthopaedics, Whiston Hospital, Prescot, L35 5DR, UK.

Background: Two-stage revision arthroplasty remains the gold standard for managing infected hip replacements. Subspecialisation, high-volume hospitals and surgeons have been linked to improved clinical outcomes. The aim of this study was to assess clinical outcomes of 2-stage revision infected hip replacements of a subspecialist surgeon. Read More

J Arthroplasty 2019 Feb 28. Epub 2019 Feb 28.

Harris Orthopedic Laboratory, Massachusetts General Hospital, Department of Orthopaedic Surgery, Harvard Medical School, Boston, MA.

Background: Widespread adoption of crosslinked polyethylene for the acetabular articular surface for total hip arthroplasty has substantially reduced revision rates and dislocation rates. We aim to provide estimates of the resulting magnitude of the annual reduction in aggregated costs of total hip arthroplasty surgery in the United States.

Methods: After we obtained, from the literature, the contrasting mid-term rates of revisions and dislocations of total hip arthroplasty using conventional polyethylene vs those using crosslinked polyethylene, specifically from only registry studies and prospective, randomized controlled studies, we multiplied these incidence figures by the cost estimates of these failures to generate approximations of the cost savings in the United States from the use of crosslinked polyethylene. Read More

Pediatr Neonatol 2019 Mar 2. Epub 2019 Mar 2.

Department of Orthopedic Surgery, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea. Electronic address:

Background: The presence of asymmetric skin folds in the medial thigh (ASM) is often used as one of the screening items for developmental dysplasia of the hip (DDH). However, few studies have evaluated the clinical relevance of ASM in DDH.

Methods: We reviewed the data of 584 infants aged 4-12 months who were referred to our institute because of suspicious findings in periodic infantile DDH screenings. Read More

Arch Orthop Trauma Surg 2019 Mar 22. Epub 2019 Mar 22.

Hospital of Trauma Surgery, University of Munich (LMU), Nussbaumstr. 20, 80336, Munich, Germany.

Introduction: Secondary dislocation due to loss of fixation is the most common complication after plate fixation of proximal humeral fractures. A wide range of different techniques for augmentation has been described to improve the primary and secondary stability. Nevertheless, comparative analyses on the specific advantages and limitations are missing. Read More